Home / 28,491.12-39,316.32-15,913.44

Finding the Fourth Proportional to 28,491.12, 39,316.32 and 15,913.44

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Solution

The fourth proportional to 28,491.12, 39,316.32 and 15,913.44 is: 21,959.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.12 : 39,316.32 = 15,913.44 : x
  2. Step 2: Convert to fraction form
    28,491.12/39,316.32 = 15,913.44/x
  3. Step 3: Cross multiply
    28,491.12x = 39,316.32 × 15,913.44
  4. Step 4: Simplify right side
    28,491.12x = 625,657,899.34
  5. Step 5: Solve for x
    x = 625,657,899.34/28,491.12
  6. Step 6: Final answer
    x = 21,959.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.